Tectonic Plates

Question 1

What is Pangaea?

Answer 1

Super continent

Question 2

What evidence did wegener use to validate his continental drift theory?

Answer 2

Look alike animals and plant fossils on different continents

Question 3

What is sea floor spreading?

Answer 3

New oceanic crust formed through volcanic activity

Question 4

Who was Harry Hess?

Answer 4

U.S. Geologist theory of plate tectonics

Question 5

What is the evidence for sea floor spreading?

Answer 5

New islands

Question 6

Tectonic plates are part of the lithosphere and sit on the asthenosphere true or false

Answer 6

Tectonic plates are part of the lithosphere and sit on the asthenosphere
True

Question 7

What is the asthenosphere?

Answer 7

It is part of the mantle

Question 8

What is responsible for the movements of tectonic plates?

Answer 8

Convections currents in the asthenosphere

Question 9

What is magma?

Answer 9

Magma is molten rock trapped within the earth

Question 10

What is lava?

Answer 10

Lava is molten rock that has reached the earths surface

Question 11

What are the two types of crust?

Answer 11

Continental, oceanic

Question 12

What are the layers of the earth?

Answer 12

Inner core
Outer core
Mantle
Crust

Question 13

What are diverging boundaries?

Answer 13

The line between tectonic plates moving away from each other

Question 14

What are converging boundaries?

Answer 14

The line between tectonic plates moving towards each other

Question 15

What are transform boundaries?

Answer 15

The line between tectonic plates moving along side each other

Question 16

What is a subduction zone?

Answer 16

Where plates meets

Question 17

Why do volcanoes and earthquakes align with plate boundaries?

Answer 17

Form where plates pull away from each other

Question 18

Why does Australia not have many serious earthquakes?w

Answer 18

One big tectonic plate no fault lines

Question 19

How far do tectonic plates move in a year

Answer 19

2-5cm

Question 20

What are the materials that come out of volcanoes?

Answer 20

Gas

Lava

Question 21

Define an earthquake

Answer 21

Sudden movement of earths crust caused by the release of stress

Question 22

Define p waves

Answer 22

Elastic waves

Question 23

What are S waves?

Answer 23

Secondary waves

They cause the rocks they pass through to change in shape.

Question 24

What are surface waves

Answer 24

Mechanical waves

Question 25

Which seismic waves travels the fastest?

Answer 25

P waves

Question 26

What is the epicentre of an earthquake?

Answer 26

Point on the earths surface directly above the focus of an earthquake

Question 27

What is the focus of an earthquake?

Answer 27

Place where earthquake begins

Question 28

What is the strongest earthquake recorded?

Answer 28

9.5 chile earthquake

Question 29

What is a seismograph, seismograph?

Answer 29

Seismograph is the equipment that records the earths movements, a seismograph is the visual record

Question 30

What makes tsunamis different from normal waves?

Answer 30

The wave of a tsunami is much longer than a conventional wave .
A tsunami travels up to 900 km/ hr and a conventional wave travels up to 90 km /hr

Question 31

What is continental drift?

Answer 31

The movement of the earths continents relative to each other